/*
     * PIR sensor tester
     */
     
    int LED = 13;                // LED's and buzzeer pin
    int PIR = 7;               // Output of PIR sensor pin
    int PIRState = LOW;             // initial status of PIR sensor 
    int VAL = 0;                    // set VAL as an integer variable
     
    void setup() {
      pinMode(LED, OUTPUT);      // LED pin as output
      pinMode(PIR, INPUT);     // PIR sensor output pin  as  input
      Serial.begin(9600); // open seria; monitor
    }
     
    void loop(){
     VAL = digitalRead(PIR);
      if (VAL == HIGH) {            //  if the sensor's input is HIGH
        digitalWrite(LED, HIGH);  // turn LED and Buzzer ON
        if (PIRState == LOW) {
          Serial.println("There is a Motion !");
          //  only  print on the output change, not state
          PIRState = HIGH; //Change the state
        }
      } else {
        digitalWrite(LED, LOW); // turn LED OFF
        if (PIRState == HIGH){
           
          Serial.println("Motion stopped !");
          //  only  print on the output change, not state
          PIRState = LOW;//Change the state again
        }
      }
    }